登录，注册，记住账号
package com.hanqi.kaoshi; import android.content.Intent; import android.os.Bundle; import android.support.v7.app.AppCompatActivity; import android.view.View; import android.widget.EditText; import android.widget.Toast; import com.hanqi.kaoshi.Zhuce.ZhuCeDAO; import com.hanqi.kaoshi.Zhuce.ZhuCePOJO; public class ZhuceActivity extends AppCompatActivity { EditText et_username; EditText et_userpassword,et_userpassword1; ZhuCeDAO zcd=new ZhuCeDAO(this); @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_zhuce); et_username=(EditText)findViewById(R.id.et_username); et_userpassword=(EditText)findViewById(R.id.et_userpassword); et_userpassword1=(EditText)findViewById(R.id.et_userpassword1); } public void bt1_OnClick(View v) { String username=et_username.getText().toString(); String userpassword=et_userpassword.getText().toString(); if(username==null||username.trim().length()==0) { Toast.makeText(ZhuceActivity.this, "用户名不能为空，请正确填写用户名称", Toast.LENGTH_SHORT).show(); return; }else if (zcd.getname(et_username.getText().toString()).size()>0) { Toast.makeText(ZhuceActivity.this, "用户已注册，请重新注册", Toast.LENGTH_SHORT).show(); }else if (username!=null&&userpassword.trim().length()==0) { Toast.makeText(ZhuceActivity.this, "密码不能为空", Toast.LENGTH_SHORT).show(); }else if (et_userpassword.getText().toString().equals(et_userpassword1.getText().toString())) { ZhuCePOJO zhuce = new ZhuCePOJO(username,userpassword); long l = zcd.insert(zhuce); if (l > 0) { Toast.makeText(ZhuceActivity.this, "注册成功", Toast.LENGTH_SHORT).show(); } else { Toast.makeText(ZhuceActivity.this, "注册失败", Toast.LENGTH_SHORT).show(); } }else { Toast.makeText(ZhuceActivity.this, "两次密码输入不一致，请重新输入", Toast.LENGTH_SHORT).show(); } } public void bt2_OnClick(View v) { Intent intent=new Intent(this,Denglu.class); startActivity(intent); } }
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" tools:context="com.hanqi.kaoshi.ZhuceActivity" android:background="@drawable/bg1" android:orientation="vertical"> <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_margin="30dp" android:textSize="30sp" android:textColor="#000000" android:gravity="center" android:text="考试系统注册界面"/> <EditText android:layout_width="match_parent" android:layout_height="wrap_content" android:hint="用户名称" android:textColor="#000000" android:textSize="20sp" android:id="@+id/et_username"/> <EditText android:layout_width="match_parent" android:layout_height="wrap_content" android:hint="用户密码" android:textColor="#000000" android:inputType="textPassword" android:textSize="20sp" android:id="@+id/et_userpassword"/> <EditText android:layout_width="match_parent" android:layout_height="wrap_content" android:hint="确认密码" android:textColor="#000000" android:inputType="textPassword" android:textSize="20sp" android:id="@+id/et_userpassword1"/> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:gravity="center"> <Button android:layout_width="wrap_content" android:layout_marginRight="40dp" android:background="#00B2EE" android:textColor="#000000" android:layout_height="wrap_content" android:id="@+id/bt_denglu" android:padding="3dp" android:onClick="bt1_OnClick" android:drawableLeft="@drawable/login32x32" android:text="确定"/> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:textColor="#000000" android:onClick="bt2_OnClick" android:padding="3dp" android:background="#00B2EE" android:layout_gravity="center_horizontal" android:drawableLeft="@drawable/login_exit32x32" android:text="取消"/> </LinearLayout> <ListView android:layout_width="200dp" android:layout_height="0dp" android:id="@+id/lv_1" android:layout_weight="1"></ListView> </LinearLayout>
package com.hanqi.kaoshi.Zhuce; /** * Created by Administrator on 2016/7/2. */ public class ZhuCePOJO { private long id; private String name; private String password; public long getId() { return id; } public void setId(long id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } public ZhuCePOJO(long id, String name, String password) { this.id = id; this.name = name; this.password = password; } public ZhuCePOJO(String name, String password) { this.name = name; this.password = password; } }
package com.hanqi.kaoshi.Zhuce; import android.content.ContentValues; import android.content.Context; import android.database.Cursor; import android.database.sqlite.SQLiteDatabase; import java.util.ArrayList; /** * Created by Administrator on 2016/7/2. */ public class ZhuCeDAO { private DBHelper dh; private final String TABLE_NAME="t_zhuce"; public ZhuCeDAO(Context context) { dh=new DBHelper(context); } //增 public long insert(ZhuCePOJO zhuce) { long rtn=0; SQLiteDatabase sd=dh.getReadableDatabase(); ContentValues cv=new ContentValues(); cv.put("name",zhuce.getName()); cv.put("password",zhuce.getPassword()); rtn=sd.insert(TABLE_NAME, null, cv); sd.close(); return rtn; } //删 public int delete(long id) { SQLiteDatabase sd=dh.getReadableDatabase(); int rtn=0; rtn=sd.delete(TABLE_NAME, "_id=?", new String[]{id + ""}); sd.close(); return rtn; } //改 public int update(ZhuCePOJO zhuce) { int rtn=0; SQLiteDatabase sd=dh.getReadableDatabase(); ContentValues cv=new ContentValues(); cv.put("name",zhuce.getName()); cv.put("password",zhuce.getPassword()); rtn=sd.update(TABLE_NAME, cv, "_id=?", new String[]{zhuce.getId() + ""}); sd.close(); return rtn; } //查姓名,用于输入姓名自动提示 public ArrayList<String> getStringname() { ArrayList<String> arrayList=new ArrayList<>(); SQLiteDatabase sqLiteDatabase=dh.getWritableDatabase(); Cursor cursor=sqLiteDatabase.query(TABLE_NAME, null, null, null, null, null, null); while (cursor.moveToNext()) { ZhuCePOJO zhuCe=new ZhuCePOJO(cursor.getLong(0),cursor.getString(1),cursor.getString(2)); arrayList.add(cursor.getString(1)); } sqLiteDatabase.close(); return arrayList; } //查姓名 public ArrayList<ZhuCePOJO> getname(String string) { ArrayList<ZhuCePOJO> arrayList=new ArrayList<>(); SQLiteDatabase sqLiteDatabase=dh.getWritableDatabase(); Cursor cursor=sqLiteDatabase.query(TABLE_NAME, null, "name=? ", new String[]{string}, null, null, null); while (cursor.moveToNext()) { ZhuCePOJO zhuCe=new ZhuCePOJO(cursor.getLong(0),cursor.getString(1),cursor.getString(2)); arrayList.add(0,zhuCe); } sqLiteDatabase.close(); return arrayList; } //查全部 public ArrayList<ZhuCePOJO> getAll(String string,String string1) { ArrayList<ZhuCePOJO> arrayList=new ArrayList<>(); SQLiteDatabase sqLiteDatabase=dh.getWritableDatabase(); Cursor cursor=sqLiteDatabase.query(TABLE_NAME, null, "name=? and password=? ", new String[]{string,string1}, null, null, null); while (cursor.moveToNext()) { ZhuCePOJO zhuCe=new ZhuCePOJO(cursor.getLong(0),cursor.getString(1),cursor.getString(2)); arrayList.add(0,zhuCe); } sqLiteDatabase.close(); return arrayList; } }
package com.hanqi.kaoshi.Zhuce; import android.content.Context; import android.database.sqlite.SQLiteDatabase; import android.database.sqlite.SQLiteOpenHelper; import android.util.Log; /** * Created by Administrator on 2016/7/2. */ public class DBHelper extends SQLiteOpenHelper{ public DBHelper(Context context) { super(context, "zhuce2.db",null, 1); } @Override public void onCreate(SQLiteDatabase db) { String sql="CREATE TABLE t_zhuce " + "(_id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL," + "name TEXT ,password VARCHAR(20))"; db.execSQL(sql); String sql2="CREATE TABLE t_exam " + "(_id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL," + " examname TEXT , name TEXT , score INTEGER , " + " starttime TEXT)"; db.execSQL(sql2); Log.e("TAG", "表创建成功"); } @Override public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { } }
package com.hanqi.kaoshi; import android.content.Intent; import android.content.SharedPreferences; import android.os.Bundle; import android.support.v7.app.AppCompatActivity; import android.view.View; import android.widget.ArrayAdapter; import android.widget.AutoCompleteTextView; import android.widget.Button; import android.widget.CheckBox; import android.widget.CompoundButton; import android.widget.EditText; import android.widget.Toast; import com.hanqi.kaoshi.Zhuce.ZhuCeDAO; import java.util.ArrayList; public class Denglu extends AppCompatActivity { AutoCompleteTextView actv_name; EditText ed_password; SharedPreferences sp; Button bt_denglu; CheckBox cb_1; String name,pw, return_name,return_pw; ZhuCeDAO zhuCeDAO=new ZhuCeDAO(this); ArrayAdapter<String> arrayAdapter; //自动提示数组 ArrayList<String> arrayList; SharedPreferences sp1; SharedPreferences.Editor editor; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_denglu); actv_name=(AutoCompleteTextView)findViewById(R.id.actv_name); ed_password=(EditText)findViewById(R.id.ed_password); cb_1=(CheckBox)findViewById(R.id.cb_1); sp1=getSharedPreferences("data1",MODE_PRIVATE); if(sp1.getBoolean("ISCHECK",true)) { cb_1.setChecked(true); actv_name.setText(sp1.getString("name","")); ed_password.setText(sp1.getString("password","")); } bt_denglu=(Button)findViewById(R.id.bt_denglu); arrayList=zhuCeDAO.getStringname(); arrayAdapter=new ArrayAdapter<String>(Denglu.this, android.R.layout.simple_expandable_list_item_1, arrayList); actv_name.setAdapter(arrayAdapter); //得到用户输入的用户名和密码 //需要注册才能登录的功能, bt_denglu.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { name = actv_name.getText().toString(); pw = ed_password.getText().toString(); sp = getSharedPreferences("data", MODE_PRIVATE); cb_1.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() { @Override public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) { Boolean isChecked1 = cb_1.isChecked(); editor.putBoolean("ISCHECK", isChecked1); editor.commit(); } }); return_name = sp.getString("name", ""); if (name.trim().length() == 0 || pw.trim().length() == 0) { Toast.makeText(Denglu.this, "用户名和密码不能为空", Toast.LENGTH_SHORT).show(); } else if (zhuCeDAO.getname(name).size() > 0) { if (zhuCeDAO.getAll(name, pw).size() > 0) { if(cb_1.isChecked()) { //记住用户名、密码、 editor = sp1.edit(); editor.putString("name", name); editor.putString("password",pw); editor.commit(); } Intent intent = new Intent(Denglu.this, MainActivity.class); intent.putExtra("name", name); startActivity(intent); finish(); }else { Toast.makeText(Denglu.this, "密码错误", Toast.LENGTH_SHORT).show(); } } else { Toast.makeText(Denglu.this, "用户未注册", Toast.LENGTH_SHORT).show(); } } }); } public void onCheckedChanged(CompoundButton buttonView,boolean isChecked) { if (cb_1.isChecked()) { Toast.makeText(Denglu.this, "记住密码已选中", Toast.LENGTH_SHORT).show(); sp1.edit().putBoolean("IsCheck", true).commit(); } else { Toast.makeText(Denglu.this, "记住密码没有被选中", Toast.LENGTH_SHORT).show(); sp1.edit().putBoolean("IsCheck", false).commit(); } } public void bt_zhuce (View v) { Intent intent=new Intent(this,ZhuceActivity.class); startActivity(intent); } }
